Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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Cable car passenger transport installations,
mechanical ski lifts in particular, are developing in
the direction of a high increase in the number of pas-
sengers within a given time, that is to say a high in-
crease in the transport rate of the transport installa-
tions.
In the installations which use cars, the in-
crease in the transport rates requires vehicles which
must allow the greatest number of passengers possible
to be loaded and unloaded rapidly in as reduced a car
volume as possible compatible with the possibilities of
the installation comprising the vehicles, which leads
to using cabins with large sized accesses, in particular
through a door comprising two leaves which may open along
the bodywork, either inside or outside this bodywork,
each car being moreover possibly equipped with two op-
posite doors, each with two leaves.
The essential aim of the invention is to pro-
vide an opening, closing and locking mechanism ensuring
the irreversibility of the locking while tolerating a
certain small gap between the leaves under the effect
of an obstacle jammed between these leaves without for
all that compromising the locking provided by the irre-
versibility of the control in the closed position which
is opposed to opening under the action of any parasite
force exerted on the leaves.
According to the present invention, there is
provided a mechanism for actuating a door of a car com-
prising two leaves symmetrical to each other with respect 30 to a vertical plane passing through a junction line of
the two leaves in a closed position mounted on a passenger
transporting cable car, which mechanism essentially com-
prises a first control piece with horizontal rectilinear
movement at one of heightwise ends of the two leaves and
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parallel to the vertical plane of symmetry of the two
leaves, this first control piece being integral with a
crank lever which actuates a horizontal dead point clear-
ance toggle ]oint formed of two symmetrical links actu-
ating two control levers connected to at least two mov-
able arms fixed respectively to the two leaves by means
of a resilient connection allowing a limited oscillation
of each of said leaves in the closed position with re-
spect to its control lever and consequently allowing a
gap between the two leaves in the closed position locked
by a position of the toggle joint brought beyond a dead
point.
Preferably, the above defined control may be
at the top or at the bottom of the door, but two iden-
tical controls may also be provided respectively at thetop and at the bottom of the door and connected together
by a vertical transmission.
Preferably, in the case of a single resilient
connection control, for example at the top of a two leaved
door of low height, the single control may act on a ver-
tical transmission means capable of providing locking
at the bottom of the door allowing a limited gap.
Preferably, the movement for opening or closing
each leaf may be a pivoting movement through an arc of
a circle about a vertical axis about which the lever for
actuating the leaf pivots.
However, also preferably, each leaf may be se-
cured to two arms of different lengths pivoting in a hori-
zontal plane about different vertical axes whereas the
lever controlling this leaf is then connected by the re-
silient connection to one of these arms.
Preferably, it will be noted that the invention
may be applied, by doubling its actuating mechanisms,
to two opposite doors, each with two leaves. The two
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actuating mechanisms may then be disposed symmetrically
with respect to a vertical plane of symmetry between the
two doors. Thus, in the same vehicle, two entrance and
exit passages are provided through half of the vertical
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For a better understanding of the invention, a
preferred embodiment and some variants of the invention
will be described hereafter by way of example with reference
to the accompanying schematical drawings in which:
Figure 1 is a sectional view through a vertical
plane between the two leaves of a car door with control
handle at the top of the door and actuating mechanisms at
the top and bottom of this door shown in the closed position;
Figure 2 is a section through a vertical plane
perpendicular to the sectional plane of Figure l;
Figure 3 is a horizontal section in the closed
position;
Figure 4 is an enlarged detail top view showing
the resilient connection between an actuating lever and an
arm fixed to a leaf of the door;
Figure 5 is a section similar to that of Figure
1 with a door control provided only at the top of the door
but transmitting its movement at the end of closure to a
locking means at the bottom of the door through a vertical
transmission rod;
Figure 6 is a section similar to that of Figure
2 but corresponding to Figure 5;
Figure 7 is a schematical horizontal section;
and
Figure 8 shows schematically in a top view a variant
inwhich each leaf,instead ofpivoting with a movement through
an arc of a circle about a single vertical axis, is secured
to two arms of different lengths connected to the opposite
vertical edges of the leaf and pivoting about different
vertical axes.
In the embodiment shown in Figures 1 to 4, there
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is shown at 1 the chassis of the vehicle having a door with
two leaves 2-3. A control handle 4 integral with a lever
5 pivoting about--the fixed horizontal pin 6 is provided,
in the example shown, with a toothed sector 7 meshing with
a rack 8 carried by a control piece 9 with rectilinear horizon-
tal movement parallel to the vertical plane of symmetry
passing between the two leaves. This~control piece comprises
another rack lO with vertical teeth meshing with the teeth
of a horizontal pinion 11 carried-,by the upper end of a
10 vertical transmission shaft 12 which comprises at its base
a horizontal pinion 13 identical to pinion 11 and meshing
with the rack 14 of a lower control piece 15 identical to
the upper control piece 9 and,driven with a parallel movement
in the same direction.
The two contrDl pieces 9 and l5 drive the two
leaves 2-3 respectively at the top and at the bottom by
identical means which will only be described hereafter for
the control of the leaves at the top. A crank lever 16,
integral with the control piece 9, acts on two identical
20 links 17-18 pivotally connected to two symmetrical levers
19-20 rotatable about fixed vertical pins'21-22 fixed to
chassis 1 and forming the axes of rotation o the two door
leaves 2-3. Lever 19 is connected to the radial arms 23-
24 fixed to the leaf 2 by a resilient connection shown on
25 a larger scale in Figure 4 and lever 20 is similarly connected
to the radial arms 25-26 secured to the door leaf 3. Arms
23 to 26 may bear, at their ends opposite the fixed pivoting
axes 21-22, through rollers 27-28 on a running track 29
integral with the chassis and thus supporting the weight
30 of the two door leaves 2-3. The resilient coupling shown
in Figure 4 between a lever 19 and arms 23-24 is formed
by a rod 30 `secured to lever 19 and passing through a bore
in arm 23 with sufficient play to allow a certain oscillation
of arm 23 with respect to this rod 30. The oscillation is
35 limited, in tbe example shown, by a nut 31 and controlled
in the opposite direction by the pressure of a spring 32.
On the one hand this device allows positioning of the ends
of arms 23 to 26 to be adjusted and also the contact pressure
between the two door leaves in the closed position. This
resilient device further allows a certain gap between door
leaves 2-3 to be tolerated under the effect of an obstacle
jammed between the two leaves without for all that adversely
affecting the locking explained hereafter. It will be noted
that nut 31 could be replaced by a spring allowing oscillation
of arms 23 to 26 in both directions~in the closed and locked
10 position.
Locking is obtained from the position of links
17 -18 which form a toggle joint which, close to the closure
position, clear a dead point position corresponding to the
alignment of the links so that, in the closed position,
15 the application of parasite forces F exerted on the door
leaves in the opening direction are transmitted to the links
while tending to jam them more in the locked position. Despite
this locking effect, the resilient connections between levers
19-20 and arms 23 to 26 tolerate a certain gap between the
20 dcor leaves.
In the variant shown schematically in Figures
5 to 7, control of,the door leaves is only provided at their
upper end under the action of the control piece 9 without
the use of a control piece in the lower part. It will be
25 noted that a control of the door leaves could also be used
at the bottom without a control at the top.
In the case of controlling the door leaves by
only one of the heightwise ends, at the other end, in the
place of the opening and closing control, a device may be
30 provided for locking in the closed position. For this, in
the embodiment shown in Figures 5 to 7, a cam 33 fixed to
the control piece 9 in the closed position lowers the vertical
rod 34 urged upwardly by a lower spring 35 acting on a locking
lever 36 which is pivotally mounted by one of its ends to
35 the base of rod 34. This lever 36 pivots between its ends
at 37 on a fixed horizontal shaft integral with the chassis
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whereas its end opposite rod 34 has the shape of a T whose
cross piece ends in two hooks intended, in the lowered position
of rod 34, to retain stops of the two door leaves in the
locked position while leaving these leaves with a possibility
5 ofalimited gap therebetween.
In the two embodiments shown in Figures 1 to 4
and 5 to 7, each of the two leaves of a car door pivots
about a vertical axis with a movement through an arc of
a circle in a horizontal plane. It would however be possible,
10 particularly in the case of doors of reduced height, to
use as shown in Figure 8 two symmetrical door leaves 39-
40 whose side edges 41-42 and 43-44 pivot about different
vertical axes on which are articulated rotational arms of
different lengths. One example of such door leaves is shown
15 schematicallyby the top view of Figure 8 in which at 41-
42 are shown the side edges of the two leaves 39-40 situated
one against the other in the closed position and at 43-44
the opposite édges. The rotational arms connected to edges
41 to 44 a~e shown at 45 to 48 respectively and the axes
20 of rotation from 49 to 52. The horizontal tracks of the
ends of the arms have been shown with dot dash lines and
at 41' to 44' the positions of the edges of the door leaves
when these leaves have been brought into an open position,
whereas Figure 8 shows them schematically in the closed
25 position.
It will be understood that the embodiments described
above have no limitative character and that different variants
could be envisaged without for all that departing from the
scope and spirit of the invention defined by the accompanying
30 claims.
